Ecology is a science that studies the interaction of an organism with its surroundings. Aquatic ecology in particular deals with bodies of water such as oceans, ponds, estuaries, lakes, streams and rivers. Types of ecosystems are quite diverse in different aquatic systems, they vary immensely in their composition of plants, animals, minerals, temperature, etc. There are a large number of areas that are studied under aquatic ecology including, functions and characteristics of various aquatic ecosystems, impact of human activity on aquatic systems, etc. This book, with its detailed analysis and data, will prove immensely beneficial to professionals and students involved in this area at various levels. It will help the readers in keeping pace with the rapid progress in this field.